This country hasn't used land mines in nearly 20 years. It no longer makes the indiscriminate killers nor provides them to allies. Why then is President Obama - off to Oslo this week to collect a Nobel Peace Prize - refusing to sign an international treaty to ban the shrapnel-spewing buried bombs? His refusal is ... shameful. The devices, which maim and kill for years after a conflict ends, caused more than 5,000 casualties last year in the world's poorest places such as Cambodia, Angola and Central America. Obama's stance puts him in line with Presidents George W. Bush and Bill Clinton, who both ducked a chance to put this country in line with more than 150 nations that have signed the treaty. Other notable non-signers: China, Russia, India, Pakistan and Cuba. Is this the company we want to keep? Sticking with land mines is a puzzler. The United States has a reported stockpile of 10 million devices, though it hasn't deployed any since the 1991 Gulf War. By signing the agreement, the Pentagon would hardly be giving up a mainstay weapon. It's time for Obama to go in a new direction. He should sign, not equivocate, on a treaty that Washington has avoided for over a decade. Here's a thought while typing up your Peace Prize acceptance speech, Mr. President: It's time to ban land mines.